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It is low, deformation, steel null for the die carburization hardening gear

机译：模具渗碳淬火齿轮低，变形，空钢

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PROBLEM TO BE SOLVED: To obtain a steel stock for gear, minimal in strain, by specifying a chemical composition and a structure, respectively. ;SOLUTION: This steel stock has a composition which consists of, by weight, 0.10-0.35% C, 0.01-2.5% Si, 0.20-2.50% Mn, 0.01-2.50% Cr, 0.01-2.5% Al, and the balance iron and satisfies Si+Al=0.5 to 2.6% and in which Ac₃, represented by equation I, and DI, represented by equation II, are regulated to 850-960°C and 30-250mm, respectively. The steel stock is carburized at 850-1,000°C, hardened at 800-950°C, and tempered, by which the noncarburized zone is provided with dual-phase structure consisting of martensite containing 10-70area% ferrite. Further, one or more kinds selected from a first group consisting of 0.01-0.70% Mo, 0.01-2.0% Ni, 0.01-0.70% W, and 0.01-1.0% V and/or a second group consisting of 0.005-1.0% Ti, 0.005-0.50% Nb, and 0.005-0.50% Zr can be added to this steel. Moreover, Mo and Ni can be eliminated, Si content can be changed to 0.50-2.5%, and Al can be moved to the second group and Al content can be changed to 0.005-2.0%. It is desirable to regulate DI to 30-150mm.;COPYRIGHT: (C)1997,JPO

机译：解决的问题：通过分别指定化学成分和结构，获得应变最小的齿轮钢。 ;解决方案：这种钢铁原料的成分按重量计包括0.10-0.35％C，0.01-2.5％Si，0.20-2.50％Mn，0.01-2.50％Cr，0.01-2.5％Al和余量的铁并且满足Si + Al ＝ 0.5至2.6％，并且其中由方程式I表示的Ac _{3 和由方程式II表示的DI分别被调节为850-960℃和30-250mm。。钢材在850-1,000°C渗碳，在800-950°C硬化并回火，从而使非渗碳区具有包含马氏体的铁素体含量为10-70％的双相结构。此外，选自由0.01-0.70％的Mo，0.01-2.0％的Ni，0.01-0.70％的W和0.01-1.0％的V组成的第一组中的一种或多种和/或由0.005-1.0％的Ti组成的第二组。可以向该钢中添加0.005-0.50％Nb和0.005-0.50％Zr。此外，可以消除Mo和Ni，可以将Si含量改变为0.50-2.5％，并且可以将Al移动到第二组，并且可以将Al含量改变为0.005-2.0％。最好将DI调整到30-150mm .;版权所有：（C）1997，JPO}

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公开/公告号JP2790788B2

专利类型
公开/公告日1998-08-27

原文格式PDF
申请/专利权人 TOOA SUCHIIRU KK;
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申请/专利号JP19950289383
发明设计人 EGUCHI TOYOAKI;MAJIMA HIROSHI;
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申请日1995-10-11
分类号C22C38/00;C21D6/00;C21D9/32;C22C38/18;C22C38/46;C22C38/50;C22C38/58;C23C8/22;F16H55/06;
国家 JP
入库时间 2022-08-22 03:01:38

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